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Forum topic by flapjack posted 04-24-2018 01:04 PM 1217 views 0 times favorited 14 replies Add to Favorites Watch
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flapjack

1 post in 888 days


04-24-2018 01:04 PM

Hi Guys,

I have relatively small jointer (small shop) – the two beds are 14 inch each, so a total length of 28 inch. The problem is I need to straighten up a few 8 foot battens. Is it possible to do on such a small jointer ?

The types of warps on the battens include bows, cups, and twists.


14 replies so far

View hokieman's profile

hokieman

201 posts in 4609 days


#1 posted 04-24-2018 02:02 PM

As James Comey would say, “I don’t think so, but it’s possible”. Even with a jointer with longer beds it is difficult to get a good cut at the lead and trailing ends of the material given the large amount of weight on both extending ends. With a jointer as small as you describe, it would be very difficult. Depending on how accurate you need to be you might want to consider taking it to a mill and have them do that part of the project for you.

View Lazyman's profile

Lazyman

5824 posts in 2243 days


#2 posted 04-24-2018 02:19 PM

I have see a few jointer bed extensions projects posted on LJ to so that they can joint longer boards on a small jointer. Use the search function in upper right corner of page to find them. You may have to look for jointer extensions or outfeed support. You’ve got to make it so that the extensions are perfectly aligned with the tables which may limit your ability to easily change the depth of cut but that is one way to tackle that problem without replacing the jointer.

The other option is take it somewhere where for a small fee they will do this for you…or find a nearby LJ who will do it for free.

Welcome to Lumberjocks by the way.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View Robert's profile

Robert

3959 posts in 2336 days


#3 posted 04-24-2018 06:51 PM

I use roller stands for both in and out feeds to support ends of boards.

Its still not a straightforward process.

-- Everything is a prototype thats why its one of a kind!!

View HokieKen's profile (online now)

HokieKen

15080 posts in 1994 days


#4 posted 04-24-2018 07:15 PM

Lots of skill involved in jointing timbers that long. Even with in/out feed supports. I tried to figure out how to make it work… once. Since then a handplane is faster work with much less waste for me. I understand that hand planing isn’t for everyone but there are also router sleds you can make to flatten a face or sleds you can make to use your planer as a jointer.

The latter solution (planer sled) has worked well for me often. But, the longer and heavier the wood is, the less effective it is. My planer sled is like this one:
Click for details

-- Kenny, SW VA, Go Hokies!!!

View splintergroup's profile

splintergroup

4008 posts in 2077 days


#5 posted 04-24-2018 09:01 PM

For something like that, I’d double-sided tape it to a square strip of plywood and let the table saw make a straight edge (assuming that at least one edge/side/surface is already flat).

View bondogaposis's profile

bondogaposis

5844 posts in 3206 days


#6 posted 04-24-2018 09:17 PM

The general rule of thumb is that the maximum length of board you can straighten on a jointer is twice the length of the jointer bed. With that in mind you are going to need some auxiliary infeed and outfeed supports in order to joint 8 ft boards on your jointer. Others have given you some good suggestions.

-- Bondo Gaposis

View Loren's profile (online now)

Loren

10606 posts in 4503 days


#7 posted 04-24-2018 09:40 PM

You’ll do best with at least some accurately
leveled outfeed support. If the boards aren’t
heavy they are easier to hold pressed against
the outfeed table as the cut nears the end
and the weight is cantilevered.

View Kelster58's profile

Kelster58

759 posts in 1395 days


#8 posted 04-25-2018 12:45 AM



For something like that, I d double-sided tape it to a square strip of plywood and let the table saw make a straight edge (assuming that at least one edge/side/surface is already flat).

- splintergroup

I agree, I would use my table saw and a plywood sled to true those boards up.

-- K. Stone “Tell me and I forget, teach me and I may remember, involve me and I learn.” ― Benjamin Franklin

View tomsteve's profile

tomsteve

1070 posts in 2074 days


#9 posted 04-25-2018 03:08 PM

might be wise(and easier) to see if theres a cabinet shop, lumber supplier, another woodworker nearby with a larger jointer to take them to.

View LittleShaver's profile

LittleShaver

689 posts in 1475 days


#10 posted 04-25-2018 05:26 PM

I did 14’ mahogany boards with hand planes. Don’t own a jointer. A long straight edge comes in handy. I used an 8’ piece of angle iron. After the edge was done, I flattened one face with hand planes and then ran them through the planer to get to final thickness. If i recall, they started at 6/4 and ended up about 1 1/8”. Did I mention the boards were 12-14” wide? Lots of heavy lifting and long in/out feed tables helped.

-- Sawdust Maker

View tvrgeek's profile

tvrgeek

1044 posts in 2504 days


#11 posted 03-13-2020 06:26 PM

Curious why I don’t see more extension tables. Even with 5/4×6 oak I am using, even 5 foot was an issue keeping down. A couple of fold up wings with easy to adjust pogo feet in is order. An easy 32 inches more on both sides.

As I work through my current project, I am stopping to optimize each step. Slow this time, but next project should go quicker and safer. Just saw how to do tapered legs on a jointer. Looks far less dramatic then my sled on the TS.

View unclearthur's profile

unclearthur

371 posts in 2643 days


#12 posted 03-14-2020 05:13 AM

One thing I try to do on long boards is to hand plane it enough that the maximum amount of cup or bow that you are trying to remove is less than your depth of cut. Otherwise, as the board moves past the end of the outfeed table, it seems to me you can loose your point of reference

View tvrgeek's profile

tvrgeek

1044 posts in 2504 days


#13 posted 03-14-2020 11:50 AM

I noticed that. I have a good old jointer and just got a scrub plane to get things a little flatter to start with. As I try to upgrade from carpentry level to furniture, I find I am going back to more hand tools.

View AlaskaGuy's profile

AlaskaGuy

6009 posts in 3164 days


#14 posted 03-14-2020 04:48 PM

Are you just straighten the edges or are you doing a full stock preparation?

-- Alaskan's for Global warming!

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